Update DRIVERS.md, add support for Waveshare Pico LCD 1.14

DRIVERS.md

@@ -392,6 +392,11 @@ The driver also supports the
 [TTGO T-Display](http://www.lilygo.cn/claprod_view.aspx?TypeId=62&Id=1274).
 This is an inexpensive ESP32 with a 135x240 color TFT display.
 
+Also, in landscape mode only, the
+[Waveshare Pico LCD 1.14 inch](https://www.waveshare.com/pico-lcd-1.14.htm).
+This has a hardware quirk, copy `setup_examples/st7789_pico_lcd_114.py` to
+your setup file.
+
 The `color_setup.py` file should initialise the SPI bus with a baudrate of
 30_000_000. Args `polarity`, `phase`, `bits`, `firstbit` are defaults. Hard or
 soft SPI may be used but hard may be faster. 30MHz is a conservative value: see
@@ -1042,6 +1047,15 @@ method:
 This ensures compatibility with code written for color displays by converting
 RGB values to a single bit.
 
+For color display drivers some boilerplate code is required for rendering
+monochrome objects such as glyphs:
+```python
+from drivers.boolpalette import BoolPalette
+# In the constructor:
+        mode = framebuf.GS8  # Whatever mode the driver uses
+        self.palette = BoolPalette(mode)
+        super().__init__(buf, self.width, self.height, mode)
+```
 Refresh must be handled by a `show` method taking no arguments; when called,
 the contents of the buffer underlying the `FrameBuffer` must be copied to the
 hardware.

setup_examples/st7789_pico_lcd_114.py

@@ -0,0 +1,25 @@
+# hardware_setup.py Customise for your hardware config
+
+# Released under the MIT License (MIT). See LICENSE.
+# Copyright (c) 2021 Peter Hinch, Ihor Nehrutsa
+
+# Supports:
+# Waveshare Pico LCD 1.14" 135*240(Pixel) based on ST7789V
+# https://www.waveshare.com/wiki/Pico-LCD-1.14
+# https://www.waveshare.com/pico-lcd-1.14.htm
+
+from machine import Pin, SPI
+import gc
+
+from drivers.st7789.st7789_4bit import *
+SSD = ST7789
+
+gc.collect()  # Precaution before instantiating framebuf
+# Conservative low baudrate. Can go to 62.5MHz.
+spi = SPI(1, 30_000_000, sck=Pin(10), mosi=Pin(11), miso=None)
+pcs = Pin(9, Pin.OUT, value=1)
+prst = Pin(12, Pin.OUT, value=1)
+pbl = Pin(13, Pin.OUT, value=1)
+pdc = Pin(8, Pin.OUT, value=0)
+
+ssd = SSD(spi, height=135, width=240, dc=pdc, cs=pcs, rst=prst, disp_mode=LANDSCAPE, display=TDISPLAY)